And there is that thing to resell the crap of it if you dont want to mine anymore, reselling old hardware is hard and not worth these days, sometimes is even better to throw away in the garbage. It saves a lot of time.
https://etherscan.io/chart/difficultyYou would be surprised but computer equipment actually sells pretty well. I've sold most of mine on Craiglists at asking price and if that didn't work there was also eBay as an option.
GPUs like the RX 470/570 are not considered old. A R9 280X is considered old but I had no trouble selling them in the last 12 months. Yes they are power hogs and ancient but AMD still makes drivers for them and they are great for Crossfire.
So in a couple years or so, the RX 470 will still be worth something. Never worth it throwing away in the garbage. Throwing away in the garbage is maybe worth it if the GPU is damaged and not worth the time to repair it.